The resale value of used arcade game machines is determined by several critical factors that collectors and investors should carefully consider. Condition stands as the most significant element, with cabinets in original, unrestored but well-maintained state typically commanding premium prices. Any restoration work must preserve authenticity, as modified or poorly refurbished units often lose substantial value. Rarity plays an equally crucial role - limited production runs, regional exclusivity, or games from defunct manufacturers can dramatically increase worth. The title's popularity and cultural significance also heavily influence market demand, with iconic games like Pac-Man, Donkey Kong, and Street Fighter II maintaining strong resale markets. Completeness is another vital consideration; machines missing original components such as monitors, control panels, or artwork suffer significant value depreciation. Proper documentation, including original manuals, schematics, and purchase receipts, can further enhance a machine's provenance and market appeal. Additionally, technical functionality matters greatly - while non-working units still hold value for restoration projects, fully operational machines consistently achieve higher sale prices. The cabinet style itself affects valuation, with upright models generally being more sought after than cocktail or tabletop variations. Market trends and collector demand fluctuate regularly, making current market knowledge essential for accurate valuation. Ultimately, understanding these interconnected factors - condition, rarity, popularity, completeness, and functionality - provides the foundation for making informed decisions whether buying or selling in the vibrant used arcade machine marketplace.